Am.  Jour.  Ptaarm.  ) 
April,  1910.  J 
Chlorinated  Soda  Solution. 
161 
In  fact,  the  last  word, probably  cannot  be  said  in  any  of  these 
cases  except  after  elaborate  research,  but  I  believe  there  is  ample 
evidence  that  the  assumption  of  caramelization  has  no  adequate 
experimental  basis  in  the  cases  discussed,  and  that  it  does  not  even 
savor  of  probability,  while  the  alcoholic  and  aldehydic  characters 
of  glucose  may  well  account  for  the  phenomena  in  so  far  as  they  are 
known  at  present. 
Private  Laboratory,  Bryn  Mavvr,  Pa. 
February,  1910. 
A  NOTE  ON  THE  PREPARATION  OF  CHLORINATED 
SODA  SOLUTION. 
By  Elias  Elvove. 
The  well  known  method  of  the  LT.  S.  Pharmacopoeia  (1905) 
for  preparing  chlorinated  soda  solution  from  chlorinated  lime  is 
certainly  not  a  very  simple  method  to  say  the  least.  We  need 
only  recall  the  fact  that  not  only  is  it  required  to  filter  the  aqueous 
mixture  so  as  to  free  it  from  the  insoluble  portion  remaining  in 
suspension  which  is  frequently  a  tedious  and  slow  process,  but  that 
it  is  also  required  to  afterwards  remove  the  calcium  from  the 
solution  by  adding  a  solution  of  sodium  carbonate  and  filtering  off 
the  resulting  precipitate,  thus  involving  a  second  tedious  filtration. 
Again  the  fact  that  these  precipitates  are  very  bulky  and  difficult  to 
wash  thoroughly  renders  this  process  considerably  wasteful  as 
well  as  highly  inconvenient  when  a  comparatively  large  amount  of 
this  solution  is  to  be  prepared  in  the  ordinary  chemical  or  pharma- 
ceutical laboratory.  Also  the  fact  that  such  preparations,  even  when 
kept  under  the  most  favorable  conditions,  are  comparatively  unstable 
and  hence  must  frequently  be  prepared  just  when  wanted,  renders 
the  disadvantages  mentioned  of  even  greater  magnitude  than  would 
be  the  case  if  this  preparation  were  of  a  stable  character  so  as  not 
to  lose  strength  on  long  keeping.  Finally,  the  fact  that  the  chlori- 
nated lime  itself  is  a  comparatively  unstable  substance  renders  it 
practically  impossible  to  prepare  a  chlorinated  soda  solution  of  any 
desired  strength,  or  even  with  any  close 'degree  of  approximation, 
without  having  to  carry  out  one  or  more  actual  determinations  of 
the  available  chlorine  in  the  resulting  solutions. 
